Abstract
Timing in the appearance of bare-ground is an important filter on vegetation development, which should be important for re-create desirable vegetation. A 3-yr vegetation monitoring was carried out in bare-grounds occurred at three different periods (March, July and September). The timing affected subsequent vegetation development. Plots disturbed in July tended to be dominated by Imperata cylindrica, whereas plots disturbed in March and September were dominated by Solidago altissima. Species compositions of both dispersed seeds and subsequent seedlings should be different at each season, which would lead to the differences in the coverage of dominant species and the number of species.
